Abstract: Disclosed are methods for interrogating the physiochemical properties of a protein of interest, including method for predicting the stability of a protein at low pH, such as may be encountered during a manufacturing viral inactivation step.

Abstract: An environmental sampling system includes a passage in an aircraft component and a removable collector disposed in the passage. The passage has an inlet at a first region and an outlet at a second region. When the aircraft component is in operation the first region is at a greater pressure than the second region such that air flows through the passage from the inlet to the outlet. The removable collector is configured to retain constituents from the air and to react with the media designed to mimic corrosion effects seen at higher temperatures on engine parts. The constituents can then be characterized and correlated to engine deterioration to predict maintenance activity.

Abstract: Disclosed is a system and method for low-pressure, low-flow dilution extraction. The system includes an outer housing, an inner housing partially within a heating element, and a manifold connected to the inner housing, having taps for a sample nozzle and dilution nozzle, and a through hole connecting the sample and dilution nozzle taps to allow a sample gas from, e.g., a stack to mix with a dilution gas before being drawn at a low pressure towards a gas analyzer.

Abstract: A dual-sensor fluid sensor assembly is provided. The dual-sensor fluid sensor assembly includes a probe holder, a base, and a spring. The probe holder is configured to receive and secure two fluid sensor probes. The base is configured to receive and secure the holder upon rotation of the holder into the base. The spring is positioned between the holder and the base, the spring being positioned to exert a repelling force between the holder and the base to secure the holder to the base.

Abstract: A measuring arrangement for determining at least one parameter of a fluid medium flowing through a fluid flow duct. The measuring arrangement includes a probe device designed to be arranged in the flowing medium as a hollow body having an incident flow side closing the cavity of the hollow body, an open discharge flow side, an outer contour, which generates a flow separation on the discharge flow side, for generating a backflow, and a partition wall dividing the cavity into a fluid inflow chamber and a fluid outflow chamber, wherein the fluid inflow chamber includes an inlet opening and the fluid outflow chamber includes an outlet opening.

Abstract: A mask seal test method, device, and system of using the same are described herein. One method for testing a mask seal can include blocking a respirator cartridge to create pressure within a mask, wherein the mask includes a pressure sensor, measuring pressure values within the mask using the pressure sensor, and notifying a user in response to an increased pressure decay value among the pressure values received by the mask identification reader.

Abstract: A measurement apparatus includes: a number concentration measurement device configured to measure a number concentration of particles in a air; a humidity measurement device configured to measure a humidity of the air; and a air concentration measurement device configured to measure a concentration of a specific air in the air, wherein a mass concentration of the particles in the air is calculated based on a measured number concentration, a measured humidity, a measured concentration of the specific air, and a predetermined correlation between the number concentration, the humidity, and the concentration of the specific air, and the mass concentration of the particles in the air.

Abstract: A detection cartridge, a detection method, and a detection device are provided. The detection cartridge includes a detection tank, a sample tank, N containers, and at least one first temporary tank. The sample tank is in communication with the detection tank. The N containers are in communication with the detection tank, wherein N is a positive integer greater than or equal to 2. The at least one first temporary tank is disposed on at least one of N flow paths between the N containers and the detection tank, wherein a quantity of the first temporary tanks on an nth flow path in the N flow paths is greater than or equal to that on an (n-1)th flow path, and n is a positive integer that is not less than 2 and is not more than N.

Abstract: The disclosed embodiments include downhole leak monitor systems, downhole leak monitors, and methods to monitor downhole leaks. In one embodiment, a downhole leak monitor system includes a plurality of downhole leak monitors (monitor), where each monitor is deployed along a casing of a wellbore. Each monitor is operable to detect at least one property of a fluid flow through an aperture of a barrier and to determine a location of the aperture. Each monitor is also operable to establish a connection with at least one other monitor, the connection being one of a plurality of connections, together which, communicatively connects the monitor to a top monitor. Each of the monitor is further operable to transmit data indicative of the at least one property of the fluid flow and the location of the aperture to the at least one other monitor.

Abstract: A connection system comprising: a dispensing member; a receiving member; first sealing means and second sealing means arranged at the interface between the dispensing member and the receiving member to enable redundant leak-tight engagement between the dispensing member and the receiving member; a control chamber defined between the first sealing means and the second sealing means; and means for measuring the current pressure in the control chamber so as to detect a gas leak.

Abstract: A sensor includes an inner channel with: a first portion; a second portion in communication with the first portion; a storage zone in communication with the first portion; a baffle plate extending inside the first portion; the first portion and the baffle plate being sized such that, in an air stream entering the sensor through a first, open end of the first portion and containing first particles with a diameter of 10 ?m or less and second particles with a diameter of more than 10 ?m, the first particles reach the second portion of the inner channel while the second particles reach the storage zone.

Abstract: A computer-readable storage medium storing a multilayer fluid analysis program is provided for analyzing a multilayer fluid on a feed block type T-die as 2.5 dimensions in which each layer is divided into elements. The program causing a computer to execute: a layer thickness calculation process for calculating the layer thickness under a condition that stresses in a normal direction and a tangential direction equilibrate on an interface of each layer and a flow velocity on the interface is continuous, without considering a fluid flow in a thickness direction, considering a viscoelastic effect of a fluid to analyze an encapsulation phenomenon, and based on a shape of the feed block and a second normal stress difference of resin assuming that a layer thickness in a transverse direction fluctuates in a developmental state; and a display process of displaying a calculation result of the layer thickness calculation process.

Abstract: This application relates to a portable electronic device that includes an integrated pressure sensor. The portable electronic device includes a housing that defines a cavity with a number of components disposed therein. The cavity is sealed to form a volume of air within the cavity that is vented to the external environment through a barometric vent fluidly coupled to a first opening in the housing. A sensor measures a characteristic of a second volume of air within an isolated chamber that is vented to the external environment through a second opening in the housing. The second volume of air is isolated from the first volume of air within the housing of the portable electronic device. In some embodiments, the portable electronic device is a mobile phone and the sensor is a pressure transducer.

Abstract: An apparatus for determining properties of an uncharacterized downhole fluid. The apparatus comprises an oscillation driver circuit comprising an amplifier having an output and an input, a feedback loop between the output and input of an amplifier or a logic gate, an electromechanical resonator disposed within the feedback loop such that a the resonator is driven by the oscillation driver circuit, wherein a resonant frequency of the resonator defines an oscillation frequency of the oscillator circuit, and a switch device for causing the oscillator circuit to stop driving the resonator, which thereby enables observation of a decay rate of the oscillation of the electromechanical resonator within the uncharacterized fluid. The electromechanical resonator is enclosed in a conductive layer to protect the resonator against capacitive effects of the downhole fluid.

Abstract: A particle or pollen sensor comprises an array of relative humidity sensors. A change in relative humidity is representative of a particle or pollen in contact with one or more of the sensors. A size and/or shape of a particle or pollen in contact with one or more of the sensors is optionally also determined based on the number and/or configuration of sensors. From this information, a particle or pollen type is determined.

Abstract: A leak indicating clamp utilizes a bracket clamp, a flag body, and a flag cap that enables quick identification of leaks within various pipe-based systems.

Abstract: A system and a method for accurately testing gas leak detectors by considering multiple operational parameters as per the standard requirements are disclosed. The system comprises one or more gas cylinders, a test execution chamber, mass flow controllers (MFCs), and a control system. The test execution chamber is connected to the gas cylinders via test gas pipelines and a plurality of valves, and the mass flow controllers. The test execution chamber further comprises a first chamber and a second chamber, which are connected to form a closed cycle, thereby saving consumption of the testing gases. The control system in communication with the mechanized system, thereby controlling the operation of the system for accurately testing the gas leak detector test samples. The performance of the one or more gas leak detector test samples is controlled by adjusting the density of the testing gas to a predetermined value and as per the standard requirements.

Abstract: Method for testing a test piece for the presence of a leak using a foil chamber, wherein the foil chamber has walls having at least one flexible wall region to which a measurement volume adjoins and is arranged on that side of the flexible wall region opposite the foil chamber volume and is hermetically separated from the foil chamber volume, having the following steps: placing the test piece in the foil chamber, closing the foil chamber, evacuating the foil chamber and monitoring the measurement volume during evacuation of the foil chamber, using the result of the monitoring to reach a conclusion regarding the magnitude of a leak, characterized in that a venting valve connecting the measurement volume to the atmosphere is closed when the pressure in the measurement volume is below a predefined threshold value, and is opened as soon as the pressure exceeds the threshold value.

Abstract: A physical quantity measurement device includes a housing forming a measurement flow path in which a sensor support supports a physical quantity sensor. The measurement flow path includes a sensor path in which the physical quantity sensor is disposed, an upstream curved path between the sensor path and an inlet, and a downstream curved path between the sensor path and an outlet. The housing includes a measurement narrowed portion that gradually narrows the measurement flow path in a direction from the inlet toward the physical quantity sensor. An upstream end of the sensor support is provided upstream of the measurement narrowed portion in an arrangement cross section along an imaginary straight line passing through the physical quantity sensor and extending in an arrangement direction in which the upstream curved path and the downstream curved path are arranged.

Abstract: An example of an emissions test system according to the principles of the present disclosure includes a dilution tunnel and a flow control module. Exhaust gas is mixed with dilution gas in the dilution tunnel. The dilution tunnel is configured to receive dilution gas flowing in an axial direction relative to the dilution tunnel and dilution gas flowing in a radial direction relative to the dilution tunnel. The flow control module is configured to adjust the rate of the dilution gas flow in the radial direction based on at least one of a concentration of pollutant particles in the exhaust gas, a size of pollutant particles in the exhaust gas, a concentration of a gaseous emission in the exhaust gas, a type of fuel combusted by an engine producing the exhaust gas, and a rate of fuel flow to cylinders of the engine.